Niels geoeg sxrensen



(No Model.)

N.G.sO-RENSEN.

LOGK.

No. 481,597. Patented Aug. 30, 1892.

UNITED STATES PATENT OFFICE.

NIELS GEORG SRENSEN, OF STOCKHOLM, SWEDEN.

LOCK.

SPECIFICATION forming part of Letters Patent No. 481,597, dated August30, 1892.

Application filed November 5, 1891. Serial No. 410,981. (No model.)

To a/ZZ whom it may concern:

Be it known that I, NIELs GEORG SEEN- SEN, a subject of the King ofSweden and Norway, and a resident of Stockholm, in the Kingdom ofSweden, have invented certain new and useful Improvements in Locks, ofwhich the following is a full, clear, and exact description. Y

This invention relates to a look having a bolt movable up and down andactuated only by gravity, the peculiar construction ot which is that thebolting or unbolting is accomplished from the inside by a tripper andnot with a key and that the bolting from the outside can be performed bya tripper mounted on the outside of the door, whereas a key will openthe look from the outside.

In the drawings, Figure l is a vertical section of the lock. Fig. 2represents the same viewed from the edge. Fig. 3 is a horizontal sectionon line XY,Fig.1; and Figs. Li, 5, and 6 are detail Views.

A is the bolt movable up and down, which, in the Way already well known,may be actuated by means of the lever B and lever D, contained in thehandle O. On the bolt A there is, by means ot' one or more screws E,iixed a plate F, projecting at an angle from the bolt. The same plate Fis provided with a hole, which may be arranged differently. Fig. 4represents the plate viewed from the top, and Fig. 5 is the same withthe hole shaped some# what differently. On the side of the bolt thereare a number of tumblers I'I, guided by pins I and K, running on oblongslots L in the tumblers. On the drawings four tuinblers are represented;but their number may evidently also be another. The tumblers havedownwardly-extending angle-pieces M, being about parallel with the boltand preferably placed in front of the tumblers, as shown in thedrawings. The lower ends of the said angle-pieces are situated, when thebolt is down, immediately above the plate F. In order to raise the boltand open the lock, it is thus necessary that the tumblers occupy such aposition that each of its angle-pieces M stands above a correspondinghole in the plate F.

The bolting of the look from the outside is simply effected by turningthe tripper N, situated behind the tumblers, and Vwhich for such apurpose is on its spindle provided with a button or knob N on theoutside of the door. In turning the tripper Nall the tumblers,respectively, and their angle-pieces M will be pushed forward beyond thepierced holes G, from whence the tumblers cannot be brought back orremoved by the said tripper N, as shown in Fig. l. The way in which thelook is bolted or unbolted from inside the door is effected by turningthe tripper O respectively in the direction required. The tripper O andthe tumblers are mainly so adapted and oonstruoted in connection to eachother that the tumblers, when the lock is to be unbolted, on turning thetripper O as far as possible to the desired direction will get in such aposition that all the angle-pieces M come straight above theircorresponding holes G in plate F, thus allowing the bolt to be raised.1n turning the tripper O in the opposite direction the lock willconsequently be bolted, because in doing so the tumblers will be broughtin a disordered position, respectively, to the corresponding piercedholes, thus preventing the bolt being raised. rlhe motion ot' thetripper O in the one direction is determined by the plate P, insertedbetween the tumblers which the tripper enters, and in the oppositedirection conveniently and determined bythe tumblers. The spindle of thetripper O is provided with aknob O on the inside ofthe door.

For the opening of the lock from the outside there is used a key Q, bymeans of which the advance tumblers are brought back as the key-bitactuates the upright parts H of the tumblers. Those parts ll have adifferent shape in order to obtain a certain profile of the key-bit, andfor the same purpose the plates P are also made of dierent shape. Theseplates have also for purpose by a suitable elasticity to maintain thetumblers in their respective positions. Fig. G represents a plate P. Anordinary key may also be used in lieu of the tripper O from inside thedoor, if desired. The plate Fis iixed, as described, at one side of thebolt; but it may also be fixed so that it maybe located above the bolt.The position of the tumblers must, of course, be changed accordingly.

I claim- In a lock, the combination, with a vertically-movable boltprovided with a plate pro- IOO j ecting therefrom and having holestherein, of tumblers moving in an angular direction to the bolt,angle-pieces projecting from the under side of the tumblers andsubstantially parallel to the bolt, whereby when the lock is unboltedsaid angle-pieces will be in a position directly above the said holes, atripper beneath said tumblers and reaching up into notches in the edgesthereof, and a knob on said tripper, whereby they may be actuated lofrom the outside of the door.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

NIELS GEORG SRENSEN.

Witnesses:

HERMAN KUSTERER, AXEL GEOEGII.

